The Caduceus is the symbol of Commerce and Peace, and is the emblem depicted for Hermes in his capacity as God and Protector of Commerce.
Two Gryphons support the design, together with the motto "Meliora Sequimur", which means "We aim for the best" in Latin. The Gryphon is one of the principal bearings in heraldry, and is frequently used as a charge or supporter. The chimerical creature is half eagle and half lion and legend states that when it attains full growth, it will never be taken alive. The wavy blue bar around the creatures' necks alludes to the city's location as a port on the river.